Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net sales
Net sales	$ 2,960.4	$ 2,929.6
Cost of sales
Cost of sales	2,389.9	2,334.8
Operating expenses
Selling, general and administrative expenses	326.0	335.1
Sale and leaseback transaction, gain (loss), net	24.5	0.0
Depreciation and amortization	157.3	181.6
Restructuring, impairment and transaction-related charges	18.9	124.1
Total operating expenses	2,867.6	2,975.6
Operating income (loss) from continuing operations	92.8	(46.0)
Interest expense	59.6	68.8
Net pension income	(14.5)	(10.5)
Loss on debt extinguishment	0.7	1.8
Earnings (loss) from continuing operations before income taxes and equity in (earnings) loss of unconsolidated entity	47.0	(106.1)
Income tax expense	9.5	0.3
Earnings (loss) from continuing operations before equity in (earnings) loss of unconsolidated entity	37.5	(106.4)
Equity in (earnings) loss of unconsolidated entity	(0.3)	0.2
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total	37.8	(106.6)
Loss from discontinued operations, net of tax	0.0	(21.9)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total	37.8	(128.5)
Less: net loss attributable to noncontrolling interests	0.0	(0.2)
Net earnings (loss) attributable to Quad common shareholders	$ 37.8	$ (128.3)
Earnings (loss) per share attributable to Quad common shareholders
Basic (in dollars per share)	$ 0.74	$ (2.53)
Basic, continuing operations (in dollars per share)	0.74	(2.10)
Basic, discontinued operations (in dollars per share)	$ 0	$ (0.43)
Weighted average number of common shares outstanding
Basic (in shares)	51.3	50.6
Diluted (in shares)	53.0	50.6
Product
Net sales
Net sales	$ 2,247.1	$ 2,228.7
Cost of sales
Cost of sales	1,861.0	1,831.5
Service
Net sales
Net sales	713.3	700.9
Cost of sales
Cost of sales	$ 528.9	$ 503.3